# pre calculus

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Use properties of logarithms to find the exact value of the expression
log_7 (343 * 7^15)

• pre calculus -

log7 (343*7^15)
= log7 343 + log7 7^15
= log7 7^3 + 15log77
= 3log77 + 15log77
= 3(1) + 15(1)
= 18

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