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If (3x-1)^7=a7x^7+a6x^6+a5x^5+....+a1x+a...

If `(3x-1)^7=a_7x^7+a_6x^6+a_5x^5+....+a_1x+a_0` then the value of `a_7 + a_6. . . . . . .a_0`

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f `(3x-1)^7=a_7x^7+a_6x^6+a_5x^5+....+a_1x+a_0` then the value of `a_7 + a_6. . . . . . .a_0`
Put `x=1`,`(3(1)-1)^7=a_7(1)^7+a_6(1)^6+a_5(1)^5+....+a_1(1)+a_0` `a_7 + a_6. . . . . . .a_0`
`128=a_7+a_6+a_5+....+a_1+a_0` `a_7 + a_6. . . . . . .a_0`
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