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If $x,y,z$ are independent of each other, then the sum of the coefficients in the expansion of $(5x+3y-8z)^{30}$ is -

Vee Hua Zhi
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Nikhil Kumar
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  • Welcome to MSE. It will be more likely that you will get an answer if you show us that you made an effort. – Vee Hua Zhi Nov 21 '18 at 12:57
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    I think you can get the sum of the coefficients just by setting $x=y=z=1$, am I right? – Matti P. Nov 21 '18 at 12:59
  • regroup the addition into a binomial and a monomial, then apply the binomial theorem. –  Feb 21 '19 at 16:51

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