sum of first 17 terms of an ap where 4th and 9th terms are -15 and -30
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a+3d=-15
and a+8d=-30
Thus from above,d=-3and a=-6
Sum of 17 terms=-510
a+3d=-15
and a+8d=-30
Thus from above,d=-3and a=-6
Sum of 17 terms=-510
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Bhai a ki value minus 6 aayegi mistake ho gayi please 6 ko minus 6 se replace kar d0 answer aa jayega
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sandeep371:
a ki value minus 6 aayega mistake ho gayi jaha 6 h usko minus 6 se replace kar do answer aa jayega
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