Пошаговое объяснение:
1)y=2x⁻³2)y=3√x 3)y=cos x 4) y=3cos x 5)y=2sinx 6) y=3/x 7)y=3/4ˣ
8) y=3/4 x
1 ) y = 2x⁻³ ; y' = 2* (- 3 )* x⁻⁴ = - 6x⁻⁴ ;
2) y = 3√x ; y' = 3 * 1/2 *x^(- 1/2) = 1,5x^(- 1/2 ) = 1,5/√x ;
3) y = cosx ; y' = - sinx ;
4) y = 3cosx ; y' = ( 3cosx )' = - 3sinx ;
5) y = 2sinx ; y' = ( 2sinx )' = 2cosx ;
6) y = 3/x ; y' = ( 3/x )' = ( 3x⁻¹ )' = - 3/x² ;
7)y = 3/4ˣ ; y' = ( 3/4ˣ )' = ( 3* 4⁻ˣ )' = 3 * (- 1 ) * 4⁻ˣ *ln4 = - 3* 4⁻ˣ *ln4 .
8) y = 3/4 x ; y' = ( 3/4 x )' = 3/4 * 1 = 3/4 .
Конечная стоимость товара равна 3811 рублям.
Пошаговое объяснение:
1) 3900 - 10% = ?
Для начала нужно найти эти самые десять процентов. У нас есть сто процентов - 3900. И есть два , как найти десять. Либо сто процентов разделить на десять (100% : 10 = 10%; 3900 : 10 = 390), либо сто процентов разделить на сто и умножить на десять (100% : 100 = 1%; 1% * 10 = 10%; 3900 : 100 = 39; 39 * 10 = 390). И там и там ответ одинаков, но первый быстрее и нет ненужных телодвижений.
Итак, у нас есть 10% - 390 рублей.
3900 - 390 = 3510
2) Теперь мы 3510 повышаем на 10%.
3510 - это 100%
3510 : 10 = 351 (мы нашли десять процентов по первому )
3510 + 351 = 3811 (рублей)
I started drawing when I was little. Mother and father very often gave me pens in a variety of colors, colored pencils and a beautiful white paper for drawing. I like to portray on a clean sheet something beautiful, plants, animals, sometimes people. So often I've done cards for mom and dad.
However, first my pictures were not the best. Something was awry, something that did not happen. But I always continued to draw. Now, I think I can draw very well. My works hang on the walls in my room. I often send your creations to competitions of children's drawings and often receive diplomas and prizes.
Moreover, I go to art school. I like it very much. In art school there is an atmosphere of skill and creativity. We draw still lifes, sometimes people. In the summer we go to picnic and draw nature, flowers, forest, trees, houses.
Now my drawings are pretty good. But someday I want to learn to draw like the great Russian painters I. Shishkin, I. Aivazovsky, K. Bryullov and! I'm sure I'll be able to draw even better if I tried.