Mathematics, 04.09.2020 07:01 kaciewelkerouwdfa

Find the coefficient of $y^4$ in the expansion of $(2y - 5)^7.$ I tried and got 70000 but it was incorrect, can someone please help?

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Find the coefficient of $y^4$ in the expansion of $(2y - 5)^7.$ I tried and got 70000 but it was in...

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