` 4x^(2/5) 3 cos x ` का अवकल गुणांक ज्ञात कीजिए ।

Explanation

` d/(dx) [ 4x^(2)/5+ 3 cos x] = 4 d/(dx) x^(2/5) + 3 d/(dx) cos x `
` = 4 xx 2/5 x^(2/5-1) + 3 ( -sin x) `
` = 8/5 x^(-3/5)-3 sin x `
` = 8/(5x^(3/5)) - 3 sin x `